If information is inconsistent, and even when it isn't, ask yourself, "which records am I really certain are my ancestor?" Is there a deed that might not be his? Is there a census enumeration (especially before 1850) that might not be for the right person? Consider each source or record you think refers to your ancestor and contemplate what really makes you think that.
You might realize that there is a record or two that might not really be for the person you are researching.
And that may be causing your confusion.